# deduction guides for `std::basic_regex`

From cppreference.com
< cpp‎ | regex‎ | basic regex

Defined in header `<regex>` |  |
template< class ForwardIt > basic_regex( ForwardIt, ForwardIt, std::regex_constants::syntax_option_type = std::regex_constants::ECMAScript ) -> basic_regex<typename std::iterator_traits<ForwardIt>::value_type>; |  | (since C++17)

This deduction guide is provided for std::basic_regex to allow deduction from an iterator range.

### Example

Run this code

    #include <regex>
    #include <vector>

    int main()
    {
        std::vector<char> v = {'a', 'b', 'c'};
        std::basic_regex re(v.begin(), v.end()); // uses explicit deduction guide
    }

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